Oryza meyeriana

HABIT Perennial; caespitose. Rhizomes short. Culms erect; 60–70(–100) cm long. Culm-nodes glabrous. Leaf-sheaths 6–8 cm long; striately veined; smooth; glabrous on surface. Leaf-sheath auricles erect. Ligule an eciliate membrane; 1–2 mm long; white. Leaf-blade base broadly rounded; with a brief petiole-like connection to sheath. Leaf-blades linear, or lanceolate; 15–22 cm long; 16–20 mm wide. Leaf-blade surface scaberulous. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; linear; 3–4 cm long; bearing few spikelets. Primary panicle branches appressed; simple; 2–3 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; angular; bibracteate.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic, or ovate; laterally compressed; 5–5.5 mm long; falling entire.

GLUMES Glumes both absent or obscure.

FLORETS Basal sterile florets similar; barren; without significant palea. Lemma of lower sterile floret linear, or lanceolate; 0.4–1 mm long; 0.1–0.2 length of spikelet; membranous. Lemma of upper sterile floret linear, or lanceolate; 0.4–1 mm long; 1 length of lower sterile floret; membranous. Fertile lemma elliptic; laterally compressed; 5–5.5 mm long; coriaceous; keeled; 5 -veined. Lemma surface granulose. Lemma margins interlocking with palea margins. Lemma apex acute; muticous. Palea elliptic; 5 mm long; coriaceous; 5 -veined; 1-keeled. Palea surface smooth. Palea apex acute.

FLOWER Lodicules 2; membranous. Anthers 6. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Disseminule comprising a floret.

DISTRIBUTION Asia-temperate: China. Asia-tropical: India, Indo-China, and Malesia.

NOTES Oryzeae. Fl Ceyl.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.